JPS60224745A - Sliding contact material - Google Patents

Abstract

PURPOSE:To obtain the titled material having superior wear resistance and low and stable contact resistance by adding specified amounts of Sb and In, Ti, Tl or Zr to an alloy material having a specified composition consisting of Au, Ag and Pd. CONSTITUTION:A sliding contact material producing very little dust because of its superior wear resistance and generating hardly noise because of its low and stable contact resistance is obtd. by adding 1-10wt% Sb and 0.5-3wt% at least one among In, Ti, Tl and Zr to an alloy material consisting of 30-50wt% Au, 20-40wt% Ag and 20-40wt% Pd without changing the ratio in the composition. An Fe group metal may be substituted for part of said Sb in the range of 0.01- 0.5wt%.

Description

[Detailed description of the invention] The present invention relates to improvements in sliding contact materials.

Conventionally, various types of sliding contact materials have been used, and materials for brush contacts include alloys consisting of 30 to 50% by weight of Au, 40 to 40% by weight of Ag2O, and 1) 20 to 40% by weight of d. The materials were considered.

However, brush contacts made of this alloy material have poor abrasion resistance when sliding with the commutator, and tend to generate abrasion powder, causing noise.

The present invention has been made to eliminate such drawbacks, and provides a sliding contact material with improved wear resistance by using the above-mentioned alloy material as a base material and adding a small amount of a specific material to it. That is.

The sliding contact material of the present invention has an Au of 30 to 50% by weight.

Without changing the composition ratio, sb
1 to 10% by weight and 0.5 to 3% by weight of at least one of In, Ti, 'rl, and Zr are added.

In addition, the sliding contact material of the present invention has a part of 1;
．． Fe group elements (T'
e.

Ni, Co) may be substituted.

In the sliding contact material of the present invention, Au30-50m%
, Ag2O to 40% by weight, 1) d to an alloy material consisting of 20 to 40% by weight, without changing the composition ratio, 1 to 10% by weight of sb and at least one of In, Ti, FI, and Zr. 0.5 to 3 Mm% is added (the reason is that sb and In,' are added in order to improve the wear resistance of the alloy material.
This is to disperse the intermetallic compound with I' i , 'I' l , and Z r to make it hard, and sb is 1% by weight or I
n, 'l'' i, 'I' l, Z r at least -・ species is 0.5 vehicle volume %Kimitsu cannot fully demonstrate its effect, sb or 10 city u% or In, i'' ,
When at least the species 'I' l and Zr exceeds 3% by weight, the amount of oxides generated increases, the contact resistance increases, and furthermore, it becomes unstable.

In addition, a part of sb is F in the range of 0.01 to 0.5% by weight.
When substituted with a group c element, the crystal grains become finer and the wear resistance is further improved.If it is less than 0.01% by weight, the effect of grain refinement does not appear, Even if the effect is increased by 121%, it will not be more effective.

Next, using the sliding contact material according to the present invention having the composition shown in the left column of the table below and the conventional sliding contact material,
Make brush wire rods of mm in length, cut each into 8 lengths,
One end of two parallel wires was welded to a base material with a width of 10 mm, a length of 13 + u, and a thickness of 0.211 mm, and a 2 H arc-shaped contact portion was bent at the other end to create a brush contact. .

Then, the Y contacts of the people were brought into contact with a disc-shaped commutator made of 1lli% Ag Cd, and the commutator was rotated forward and backward to conduct a sliding test under the following test conditions, and the amount of wear and contact resistance was measured. The results shown in the right column of the table below were obtained.

Test conditions Current: 0.6A Voltage: 12V Load: Resistance load Rotation speed: 1000rpm Circumferential speed: 130-120m/min Contact crab 100g Test time = 7 hours (blank space below) The above table clearly shows that It can be seen that the brush contacts of Examples 1 to 6 have significantly less wear than the conventional brush contacts, and that the contact resistance is low and stable.

This is simply because the sliding contact material of the present invention constituting the brush wire of the brush contacts of Examples 1 to 6 has sb and In,
This is because the dispersion of intermetallic compounds with i''i, i'l, and Zr results in hardness and improved wear resistance.Especially, the brush contact of Example 6 is superior to the brush contacts of Examples 1 to 5. The reason why the amount of wear is even smaller is that Fe group metal is added to the sliding contact material of the present invention that makes up the brush wire, and its crystal grains are made finer and dispersed, which further improves the wear resistance. It's only because they are improving.

As detailed above, according to the sliding contact material according to the present invention,
The result is that it is possible to obtain a brush contact that has significantly superior wear resistance compared to conventional sliding contact materials, generates extremely little abrasion powder, has low contact resistance, is stable, and generates almost no noise. There is.

Applicant Tanaka Kikinzoku Kogyo Co., Ltd.

Claims (1)

[Claims] 1) A u 30-50jJfft%, A g
Sb+: without changing the composition ratio to an alloy material consisting of 20 to 40 i mass% and I'd 20 to 4 offhiht%.
l-10% by weight and In, 'I'i. Sliding contact material containing 0.5 to 3% by weight of at least one of 'I''l and Zr. 2) Part of Sb is o, o1 to o, l in the range of 5m1t%.
・'Claim 1 in which 1 is replaced with an element of group e
Sliding contact material described in Section 2.